Steareth-2
Ingredient Info
Steareth-2 is a nonionic emulsifier derived from stearyl alcohol and ethylene oxide. It helps mix oil and water in skincare formulations to create stable, smooth creams and lotions.
Benefits
- Stabilizes oil-water emulsions
- Helps create smooth product texture
- Allows even distribution of active ingredients like sunscreens
Potential concerns
- May increase skin water loss (TEWL) in normal skin at typical use concentrations
- Can affect how much active ingredient penetrates the skin depending on formulation
Science: Research shows steareth-2 acts as an emulsifier but can alter skin barrier function—it increased transepidermal water loss in normal skin while unexpectedly decreasing it in damaged skin, suggesting it may interact with skin lipids. The ingredient also influences how effectively sunscreen agents penetrate or remain on the skin depending on the overall emulsion system used.
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